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Pretty similar at least with a solid white body and cerata are:
Tenellia sp. 40 which differs by an opaque white patch on the head, has orange, white and orange bands on the rhinophores and lacks the orange line between the oral tentacles, and
Tenellia sp. 06 which has also an orange line on the anterior end of the head between the oral tentacles, but differs by thin opaque white lines on the white cerata.
How to cite:
Köhler, E. (2017), published 24 June 2017, Tenellia sp. 43 Genus: A. Costa, 1866
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sp_43.htm